Yes — slotlane.app has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 slotlane.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:de37 answers · 443✓ 2606:4700:3035::6815:3610 answers · 443	yes
www over IPv6 www.slotlane.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::6815:3610 answers · 443✓ 2606:4700:3037::ac43:de37 answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. kate.ns.cloudflare.com ✓vin.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://slotlane.app/ via 2606:4700:3037::ac43:de37 → 302https://sweet-sea-ca81.cloudflareaccess.com/cdn-cgi/access/login/slotlane.app?kid=0197391d8f6639b9ccb79ec6f64e2287f483ed0bf8907373bc52932378049b6e&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImFhYWI3MzcyOTQzODIzZTU2ZGFhZDFjM2I0NWRmZGNhZTUzMjFmZTgxNTkxYzdmNzYxNzFmMmVlYjIyMTI5M2IifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6IjAxOTczOTFkOGY2NjM5YjljY2I3OWVjNmY2NGUyMjg3ZjQ4M2VkMGJmODkwNzM3M2JjNTI5MzIzNzgwNDliNmUiLCJob3N0bmFtZSI6InNsb3RsYW5lLmFwcCIsInJlZGlyZWN0X3VybCI6Ii8iLCJzZXJ2aWNlX3Rva2VuX3N0YXR1cyI6ZmFsc2UsImlzX3dhcnAiOmZhbHNlLCJpc19nYXRld2F5IjpmYWxzZSwiZXhwIjoxNzk0MDEyOTcxLCJuYmYiOjE3OTQwMTI2NzEsImlhdCI6MTc5NDAxMjY3MSwiYXV0aF9zdGF0dXMiOiJOT05FIiwibXRsc19hdXRoIjp7ImNlcnRfaXNzdWVyX2RuIjoiIiwiY2VydF9zZXJpYWwiOiIiLCJjZXJ0X2lzc3Vlcl9za2kiOiIiLCJjZXJ0X3ByZXNlbnRlZCI6ZmFsc2UsImNvbW1vbl9uYW1lIjoiIiwiYXV0aF9zdGF0dXMiOiJOT05FIn0sInJlYWxfY291bnRyeSI6IlVTIiwiYXBwX3Nlc3Npb25faGFzaCI6ImQ4ZGQxMWIzNDI2NzhkZTg3YTcxMDE0YTU2MDU4YzlkODI2NDljMDg2NDI1YTY4YzczMTgwMWQ0ZDA1ODkzOGIifQ.Xw5rJNg5XaXK3hAflMt_gzToJOXN08ewOATQ9s7wn-wxXgqGMAgR3MMIlRSrlWoKAprEs78uNgBtGwa9vV0CTYco-Yklvk2cNaU3D-ECEK3yyxTDUUS6EDsST3g_MuV0TK0lPturClZhyHnYPvMd9cZapy53jnvtDVECbCKmfEztln4rIpaOzlYBE79eW_nlyFeOxli_GY5_iYQBx-tX4fnvsCnYEnBMr0SP9h7kgvW2R0pYlt_oXcrbWWNJf5Xcnp6uTtrgNtXnh5l5pEzf4oM9zwc76UAQD8Zh3UhTvewz8JlxmkYX6kavTlWJy-qfPFzSOBY1EZA757b-J9KxVg&redirect_url=%2F via 2606:4700:300a::6813:c21d → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/slotlane.app.svg)](https://aaaa.bot/slotlane.app)

Check again

slotlane.app Has IPv6

A (IPv4)	172.67.222.55 104.21.54.16
AAAA (IPv6)	2606:4700:3037::ac43:de37 2606:4700:3035::6815:3610

www.slotlane.app Has IPv6

A (IPv4)	104.21.54.16 172.67.222.55
AAAA (IPv6)	2606:4700:3035::6815:3610 2606:4700:3037::ac43:de37

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

IPv6 measurement: slotlane.app
Measured 2026-11-07 00:51:11 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.222.55, 104.21.54.16
AAAA (IPv6): 2606:4700:3037::ac43:de37, 2606:4700:3035::6815:3610
www AAAA:    2606:4700:3035::6815:3610, 2606:4700:3037::ac43:de37

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: slotlane.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:de37: answers (TCP 443)
    2606:4700:3035::6815:3610: answers (TCP 443)
- www over IPv6: www.slotlane.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::6815:3610: answers (TCP 443)
    2606:4700:3037::ac43:de37: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.
- Nameservers have IPv6: 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://slotlane.app/ via 2606:4700:3037::ac43:de37 -> HTTP 302, certificate: valid
    https://sweet-sea-ca81.cloudflareaccess.com/cdn-cgi/access/login/slotlane.app?kid=0197391d8f6639b9ccb79ec6f64e2287f483ed0bf8907373bc52932378049b6e&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImFhYWI3MzcyOTQzODIzZTU2ZGFhZDFjM2I0NWRmZGNhZTUzMjFmZTgxNTkxYzdmNzYxNzFmMmVlYjIyMTI5M2IifQ.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.Xw5rJNg5XaXK3hAflMt_gzToJOXN08ewOATQ9s7wn-wxXgqGMAgR3MMIlRSrlWoKAprEs78uNgBtGwa9vV0CTYco-Yklvk2cNaU3D-ECEK3yyxTDUUS6EDsST3g_MuV0TK0lPturClZhyHnYPvMd9cZapy53jnvtDVECbCKmfEztln4rIpaOzlYBE79eW_nlyFeOxli_GY5_iYQBx-tX4fnvsCnYEnBMr0SP9h7kgvW2R0pYlt_oXcrbWWNJf5Xcnp6uTtrgNtXnh5l5pEzf4oM9zwc76UAQD8Zh3UhTvewz8JlxmkYX6kavTlWJy-qfPFzSOBY1EZA757b-J9KxVg&redirect_url=%2F via 2606:4700:300a::6813:c21d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/vfGvRGCPVC

Permanent link: aaaa.bot/r/vfGvRGCPVC · How we measure

Checked 2026-11-07 00:51:11 UTC. Full DNS report: dns.pizza/domain/slotlane.app · Age, certificate and blocklists: how.is/slotlane.app · JSON: /api/v1/slotlane.app